60e892bf31
No functional changes, but:
+ the mrouting module now should behave the same as the compiled-in
version (it did not before, some of the rsvp code was not loaded
properly);
+ netinet/ip_mroute.c is now truly optional;
+ removed some redundant/unused code;
+ changed many instances of '0' to NULL and INADDR_ANY as appropriate;
+ removed several static variables to make the code more SMP-friendly;
+ fixed some minor bugs in the mrouting code (mostly, incorrect return
values from functions).
This commit is also a prerequisite to the addition of support for PIM,
which i would like to put in before DP2 (it does not change any of
the existing APIs, anyways).
Note, in the process we found out that some device drivers fail to
properly handle changes in IFF_ALLMULTI, leading to interesting
behaviour when a multicast router is started. This bug is not
corrected by this commit, and will be fixed with a separate commit.
Detailed changes:
--------------------
netinet/ip_mroute.c all the above.
conf/files make ip_mroute.c optional
net/route.c fix mrt_ioctl hook
netinet/ip_input.c fix ip_mforward hook, move rsvp_input() here
together with other rsvp code, and a couple
of indentation fixes.
netinet/ip_output.c fix ip_mforward and ip_mcast_src hooks
netinet/ip_var.h rsvp function hooks
netinet/raw_ip.c hooks for mrouting and rsvp functions, plus
interface cleanup.
netinet/ip_mroute.h remove an unused and optional field from a struct
Most of the code is from Pavlin Radoslavov and the XORP project
Reviewed by: sam
MFC after: 1 week
261 lines
9.4 KiB
C
261 lines
9.4 KiB
C
/*
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* Copyright (c) 1989 Stephen Deering.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Stephen Deering of Stanford University.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ip_mroute.h 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#ifndef _NETINET_IP_MROUTE_H_
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#define _NETINET_IP_MROUTE_H_
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/*
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* Definitions for IP multicast forwarding.
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*
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* Written by David Waitzman, BBN Labs, August 1988.
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* Modified by Steve Deering, Stanford, February 1989.
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* Modified by Ajit Thyagarajan, PARC, August 1993.
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* Modified by Ajit Thyagarajan, PARC, August 1994.
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*
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* MROUTING Revision: 3.3.1.3
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*/
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/*
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* Multicast Routing set/getsockopt commands.
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*/
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#define MRT_INIT 100 /* initialize forwarder */
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#define MRT_DONE 101 /* shut down forwarder */
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#define MRT_ADD_VIF 102 /* create virtual interface */
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#define MRT_DEL_VIF 103 /* delete virtual interface */
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#define MRT_ADD_MFC 104 /* insert forwarding cache entry */
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#define MRT_DEL_MFC 105 /* delete forwarding cache entry */
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#define MRT_VERSION 106 /* get kernel version number */
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#define MRT_ASSERT 107 /* enable PIM assert processing */
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#define GET_TIME(t) microtime(&t)
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/*
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* Types and macros for handling bitmaps with one bit per virtual interface.
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*/
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#define MAXVIFS 32
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typedef u_long vifbitmap_t;
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typedef u_short vifi_t; /* type of a vif index */
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#define ALL_VIFS (vifi_t)-1
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#define VIFM_SET(n, m) ((m) |= (1 << (n)))
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#define VIFM_CLR(n, m) ((m) &= ~(1 << (n)))
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#define VIFM_ISSET(n, m) ((m) & (1 << (n)))
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#define VIFM_CLRALL(m) ((m) = 0x00000000)
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#define VIFM_COPY(mfrom, mto) ((mto) = (mfrom))
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#define VIFM_SAME(m1, m2) ((m1) == (m2))
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/*
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* Argument structure for MRT_ADD_VIF.
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* (MRT_DEL_VIF takes a single vifi_t argument.)
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*/
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struct vifctl {
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vifi_t vifc_vifi; /* the index of the vif to be added */
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u_char vifc_flags; /* VIFF_ flags defined below */
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u_char vifc_threshold; /* min ttl required to forward on vif */
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u_int vifc_rate_limit; /* max rate */
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struct in_addr vifc_lcl_addr; /* local interface address */
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struct in_addr vifc_rmt_addr; /* remote address (tunnels only) */
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};
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#define VIFF_TUNNEL 0x1 /* vif represents a tunnel end-point */
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#define VIFF_SRCRT 0x2 /* tunnel uses IP source routing */
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/*
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* Argument structure for MRT_ADD_MFC and MRT_DEL_MFC
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* (mfcc_tos to be added at a future point)
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*/
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struct mfcctl {
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struct in_addr mfcc_origin; /* ip origin of mcasts */
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struct in_addr mfcc_mcastgrp; /* multicast group associated*/
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vifi_t mfcc_parent; /* incoming vif */
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u_char mfcc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
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};
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/*
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* The kernel's multicast routing statistics.
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*/
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struct mrtstat {
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u_long mrts_mfc_lookups; /* # forw. cache hash table hits */
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u_long mrts_mfc_misses; /* # forw. cache hash table misses */
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u_long mrts_upcalls; /* # calls to mrouted */
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u_long mrts_no_route; /* no route for packet's origin */
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u_long mrts_bad_tunnel; /* malformed tunnel options */
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u_long mrts_cant_tunnel; /* no room for tunnel options */
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u_long mrts_wrong_if; /* arrived on wrong interface */
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u_long mrts_upq_ovflw; /* upcall Q overflow */
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u_long mrts_cache_cleanups; /* # entries with no upcalls */
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u_long mrts_drop_sel; /* pkts dropped selectively */
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u_long mrts_q_overflow; /* pkts dropped - Q overflow */
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u_long mrts_pkt2large; /* pkts dropped - size > BKT SIZE */
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u_long mrts_upq_sockfull; /* upcalls dropped - socket full */
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};
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/*
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* Argument structure used by mrouted to get src-grp pkt counts
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*/
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struct sioc_sg_req {
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struct in_addr src;
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struct in_addr grp;
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u_long pktcnt;
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u_long bytecnt;
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u_long wrong_if;
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};
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/*
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* Argument structure used by mrouted to get vif pkt counts
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*/
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struct sioc_vif_req {
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vifi_t vifi; /* vif number */
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u_long icount; /* Input packet count on vif */
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u_long ocount; /* Output packet count on vif */
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u_long ibytes; /* Input byte count on vif */
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u_long obytes; /* Output byte count on vif */
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};
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/*
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* The kernel's virtual-interface structure.
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*/
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struct vif {
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u_char v_flags; /* VIFF_ flags defined above */
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u_char v_threshold; /* min ttl required to forward on vif*/
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u_int v_rate_limit; /* max rate */
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struct tbf *v_tbf; /* token bucket structure at intf. */
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struct in_addr v_lcl_addr; /* local interface address */
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struct in_addr v_rmt_addr; /* remote address (tunnels only) */
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struct ifnet *v_ifp; /* pointer to interface */
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u_long v_pkt_in; /* # pkts in on interface */
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u_long v_pkt_out; /* # pkts out on interface */
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u_long v_bytes_in; /* # bytes in on interface */
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u_long v_bytes_out; /* # bytes out on interface */
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struct route v_route; /* cached route if this is a tunnel */
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u_int v_rsvp_on; /* RSVP listening on this vif */
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struct socket *v_rsvpd; /* RSVP daemon socket */
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};
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/*
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* The kernel's multicast forwarding cache entry structure
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* (A field for the type of service (mfc_tos) is to be added
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* at a future point)
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*/
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struct mfc {
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struct in_addr mfc_origin; /* IP origin of mcasts */
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struct in_addr mfc_mcastgrp; /* multicast group associated*/
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vifi_t mfc_parent; /* incoming vif */
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u_char mfc_ttls[MAXVIFS]; /* forwarding ttls on vifs */
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u_long mfc_pkt_cnt; /* pkt count for src-grp */
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u_long mfc_byte_cnt; /* byte count for src-grp */
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u_long mfc_wrong_if; /* wrong if for src-grp */
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int mfc_expire; /* time to clean entry up */
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struct timeval mfc_last_assert; /* last time I sent an assert*/
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struct rtdetq *mfc_stall; /* q of packets awaiting mfc */
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struct mfc *mfc_next; /* next mfc entry */
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};
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/*
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* Struct used to communicate from kernel to multicast router
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* note the convenient similarity to an IP packet
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*/
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struct igmpmsg {
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u_long unused1;
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u_long unused2;
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u_char im_msgtype; /* what type of message */
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#define IGMPMSG_NOCACHE 1
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#define IGMPMSG_WRONGVIF 2
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u_char im_mbz; /* must be zero */
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u_char im_vif; /* vif rec'd on */
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u_char unused3;
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struct in_addr im_src, im_dst;
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};
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/*
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* Argument structure used for pkt info. while upcall is made
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*/
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struct rtdetq {
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struct mbuf *m; /* A copy of the packet */
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struct ifnet *ifp; /* Interface pkt came in on */
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vifi_t xmt_vif; /* Saved copy of imo_multicast_vif */
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struct rtdetq *next; /* Next in list of packets */
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};
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#define MFCTBLSIZ 256
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#if (MFCTBLSIZ & (MFCTBLSIZ - 1)) == 0 /* from sys:route.h */
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#define MFCHASHMOD(h) ((h) & (MFCTBLSIZ - 1))
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#else
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#define MFCHASHMOD(h) ((h) % MFCTBLSIZ)
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#endif
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#define MAX_UPQ 4 /* max. no of pkts in upcall Q */
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/*
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* Token Bucket filter code
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*/
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#define MAX_BKT_SIZE 10000 /* 10K bytes size */
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#define MAXQSIZE 10 /* max # of pkts in queue */
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/*
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* the token bucket filter at each vif
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*/
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struct tbf
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{
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struct timeval tbf_last_pkt_t; /* arr. time of last pkt */
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u_long tbf_n_tok; /* no of tokens in bucket */
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u_long tbf_q_len; /* length of queue at this vif */
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u_long tbf_max_q_len; /* max. queue length */
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struct mbuf *tbf_q; /* Packet queue */
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struct mbuf *tbf_t; /* tail-insertion pointer */
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};
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#ifdef _KERNEL
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struct sockopt;
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extern int (*ip_mrouter_set)(struct socket *, struct sockopt *);
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extern int (*ip_mrouter_get)(struct socket *, struct sockopt *);
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extern int (*ip_mrouter_done)(void);
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extern int (*mrt_ioctl)(int, caddr_t);
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#endif /* _KERNEL */
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#endif /* _NETINET_IP_MROUTE_H_ */
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